changed docker

Dockerfile

@@ -1,40 +1,61 @@
-# Multi-stage build for production
-FROM node:22-alpine AS deps
+# ---------- Base for installs ----------
+FROM node:22-alpine AS base
 WORKDIR /app
+
+# ---------- Production deps ----------
+FROM base AS deps
 COPY package*.json ./
+# nur Prod-Deps für die runner-Stage (schnellerer Start, kleineres Image)
 RUN npm ci --only=production
 
-FROM node:22-alpine AS builder
-WORKDIR /app
+# ---------- Full deps + Build ----------
+FROM base AS builder
 COPY package*.json ./
+# volle Deps inkl. devDependencies
 RUN npm ci
+# Rest des Codes
 COPY . .
 RUN npm run build
 
+# ---------- Development stage ----------
+FROM base AS dev
+ENV NODE_ENV=development
+# nur package-Dateien kopieren, damit npm install gecacht wird
+COPY package*.json ./
+RUN npm install
+# Quellcode kommt zur Laufzeit per Bind-Mount aus Compose
+# (sorgt für Hot Reload)
+EXPOSE 3000
+ENV HOSTNAME="0.0.0.0"
+CMD ["npm", "run", "dev"]
+
+# ---------- Production runner ----------
 FROM node:22-alpine AS runner
 WORKDIR /app
 
 ENV NODE_ENV=production
 ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
 
-# Create non-root user
-RUN addgroup --system --gid 1001 nodejs
-RUN adduser --system --uid 1001 nextjs
+# non-root user
+RUN addgroup --system --gid 1001 nodejs \
+  && adduser --system --uid 1001 nextjs
 
-# Copy built application
+# für Healthcheck
+RUN apk add --no-cache curl
+
+# statische Assets & Standalone-Output aus builder
 COPY --from=builder /app/public ./public
 COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
 
 USER nextjs
-
 EXPOSE 3000
 
-ENV PORT=3000
-ENV HOSTNAME="0.0.0.0"
-
-# Health check
+# Health check (pfad anpassen, falls dein Endpoint anders heißt)
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-  CMD curl -f http://localhost:3000/api/health || exit 1
+  CMD curl -fsS http://127.0.0.1:3000/api/health || exit 1
 
+# Next.js standalone startet über server.js
 CMD ["node", "server.js"]
+